Performance analysis of Wi-Fi shaped SIW antennas

In this paper, two different Wi-Fi shaped Substrate Integrated Waveguide (SIW) antennas are designed and fabricated. Both antennas were designed to operate at 7 GHz frequency or in centimeter-wavelength range. The essential parameters and dimensions of the proposed designs were estimated theoretically via mathematical calculations. Both the antennas were then simulated by using CST Studio suite finite element method based simulation software and have been optimized to operate within the Wi-Fi, Bluetooth and Wi-Max frequency bands respectively. In fabrication process, Wi-Fi shaped antennas were designed by taking dimensions of patch as 35 (L) mm × 26 (W) mm × 0.035 (h) mm on Roger RT Duroid 5880 substrate. The copper metal of thickness 8270 μm with loss tangent is 0.0009 is deposited with dielectric constant 2.20 on the substrate. Then microdrill is used to obtained vias or holes on the substrate. Experimental results related to antenna parameters highlighted in the paper further shows that fabricated SIW antennas are in good agreement with the predicted values calculated by the simulated model. Based on the experimental prototypes modeling, a thorough comparative analysis between the two different Wi-Fi shaped SIW antennas is investigated for different parameters like gain, bandwidth, reflection coefficient (S11) and radiation pattern & hence highlighted in the paper. The results of double Wi-Fi shaped antenna reveal better performance than the single Wi-Fi shaped antenna.